The vacuum generator of vacuum coating machine is a new type of high-efficiency, clean, economical, and small vacuum components that use positive pressure air source to generate negative pressure. This makes it necessary to use positive pressure in places where there is compressed air or in a pneumatic system. It becomes very easy and convenient to obtain negative pressure in the place of negative pressure. Vacuum generators are widely used in industrial automation in the fields of machinery, electronics, packaging, printing, plastics and robots. The traditional use of vacuum generators is to cooperate with vacuum suction cups to absorb and transport various materials, especially suitable for adsorption of fragile, Soft, thin non-ferrous, non-metallic materials or spherical objects. In this type of application, a common feature is the small amount of air required, low vacuum requirements and intermittent work. The author believes that the analysis and research on the suction mechanism of the vacuum generator and the factors that affect its performance have practical significance that cannot be ignored for the design and selection of the positive and negative pressure air circuit.

       Working principle of vacuum coating machine generator
       The working principle of the vacuum coating machine generator is to use the nozzle to inject compressed air at high speed to form a jet at the nozzle outlet to generate entrainment flow. Under the action of entrainment, the air around the nozzle outlet is continuously sucked Go, make the pressure in the adsorption chamber drop below atmospheric pressure, forming a certain degree of vacuum.